Displaying 20 results from an estimated 3000 matches similar to: "Matrix Inversion"
2011 May 27
1
eigenvalues and correlation matrices
I'm trying to test if a correlation matrix is positive semidefinite.
My understanding is that a matrix is positive semidefinite if it is
Hermitian and all its eigenvalues are positive. The values in my
correlation matrix are real and the layout means that it is symmetric.
This seems to satisfy the Hermitian criterion so I figure that my real
challenge is to check if the eigenvalues are all
2004 Dec 10
1
How to circumvent negative eigenvalues in the capscale function
Dear All
I am trying to do a partial canonical analysis of principal coordinates
using Bray-Curtis distances. The capscale addin to R appears to be the only
way of doing it, however, when I try and calculate a Bray-Curtis distance
matrix either using Capscale or Vegedist (capscale I understand uses
Vegedist anyway to calculate its distance matrix), R uses up all available
memory on the computer,
2024 Oct 10
1
Problem with a domain controller that is located in a separate site
I was running samba 4.21 as a domain controller and now I see this situation
, I have empty outbound neighbors, but if you look from the windows side,
then this is the difference between windows controllers and samba, for some
reason the repsTo attribute is not filled, for example, the configuration
context, although windows controllers have both attributes fully filled,
although they are the same
2024 Oct 10
1
Problem with a domain controller that is located in a separate site
thanks for the video provided, I watched it, I didn't understand
something very well, but still, as I understand it,
in order for the sites to start communicating with each other,
a linked site link is needed, and also if there is
only one dc on the site, we tell him to act as breadgehead, which I
did in the screenshots below, but this did not affect the creation of
ntdsconnections, but as I
2007 Jul 13
2
nearest correlation to polychoric
Dear all,
Has someone implemented in R (or any other language)
Knol DL, ten Berge JMF. Least-squares approximation of an improper correlation matrix by a proper one. Psychometrika, 1989, 54, 53-61.
or any other similar algorithm?
Best regards
Jens Oehlschl?gel
Background:
I want to factanal() matrices of polychoric correlations which have negative eigenvalue. I coded
Highham 2002
2017 Sep 05
3
Packet capture to analysis the tinc connection close
Hi, All
Recently, one of my tinc client always suffer connection drop, I was suspect the connection was not stable to cause this issue, and BTW, I’ve set the PingTimeout to 10 seconds already, but this situation still happens a lot sometimes, but when the connection drop happens, the connection recovery pretty fast, normally in a minutes.
In order to deep dive into the cause, or proven the
2007 Aug 26
2
R-2.5.1 RedHat EL5 compilation failed
I can't get R-2.5.1 compiled under RedHat EL5 with gcc 4.1.1. Configure
failed at the following:
checking readline/history.h usability... no
checking readline/history.h presence... no
checking for readline/history.h... no
checking readline/readline.h usability... no
checking readline/readline.h presence... no
checking for readline/readline.h... no
checking for rl_callback_read_char in
2003 Jul 31
1
oplock_break: client failure in oplock break in file ...
Hi!
I keep getting errors like these:
oplock_break failed for file Word/einaikoon/v-Locator/IBB-Beantragung/0_Antrag_AZK.doc (dev = 301, inode = 2469218, file_id = 7).
[2003/07/31 15:43:22, 0] smbd/oplock.c:oplock_break(843)
oplock_break: client failure in break - shutting down this smbd.
[2003/07/31 15:47:12, 0] smbd/oplock.c:oplock_break(758)
oplock_break: receive_smb error (Success)
2017 Jul 15
2
observium graphs
Am 15.07.2017 um 20:26 schrieb Aki Tuomi:
> Hi!
> Just thought I'd remind about few things,
>
> since v2.2.22 you can use doveadm -fjson, to print data in json format, which might be easier to parse.
As for Debian stable (dovecot 2.2.27) -f json is missing from the manpage.
> since v2.2.22 you can use doveadm HTTP API to get the statistics over HTTP.
>
> since v2.2.27
2008 Mar 05
2
matrix inversion using solve() and matrices containing large/small values
Hello
I've stumbled upon a problem for inversion of a matrix with large values,
and I haven't found a solution yet... I wondered if someone could give a
hand. (It is about automatic optimisation of a calibration process, which
involves the inverse of the information matrix)
code:
*********************
> macht=0.8698965
> coeff=1.106836*10^(-8)
>
2020 Jul 20
4
Performance issues since upgrading to 3.X to 4.X
Hello,
I'm a bit desperate so I'm trying to seek help here.
Many year ago, I built myself 2 file servers (5 disks enclosure for
data, 2 disks enclosure for the OS) on a computer.
It was running on Debian 7.11 for years without an issue and I was
getting 75MB/95MB when transferring file from it to a Windows client,
all having a 1gbs network card.
https://i.ibb.co/N618Z4W/Debian-7.png
2014 Mar 29
1
uefi
How can I install
a dual boot centos
in my laptop
while my windows has
UEFI partition?
--
With The Best
H.Lanjanian
-----------------------------------------------------------------------
Hossein Lanjanian,
Ph.D. student
Laboratory of Systems Biology and Bioinformatics
(LBB)
Institute of Biochemistry and Biophysics (IBB), University of
Tehran
Tehran, Iran
http://LBB.ut.ac.ir
2007 Mar 14
2
loaderror in line 85
Hello,
I hope this has not been discussed very often previously, but I do not
know how to search the archives, so I cannot prevent posting this. I
installed puppet (and removed it andf installed it again, which gave me
these error messages:
when removing:
puppetmaster: unknown service
error: %preun(puppet-server-0.22.1-1.i386) scriptlet failed, exit status 1
when installing:
puppet: unknown
2004 Jun 29
2
Several PCA questions...
Hi, I am doing PCA on several columns of data in a data.frame.
I am interested in particular rows of data which may have a particular
combination of 'types' of column values (without any pre-conception of
what they may be).
I do the following...
# My data table.
allDat <- read.table("big_select_thresh_5", header=1)
# Where some rows look like this...
# PDB SUNID1
2017 Jul 15
2
observium graphs
Hello dovecot list,
I'm in the middle of creating a plugin for observium[1] and would like
to have it create[2] statistical graphs of my dovecot server [3].
The current state can be found here:
https://image.ibb.co/efOO9a/dovecot.png
However for visibility purposes it doesnt make sense and have observium
plot two data sources with different orders of magnitudes right into one
graph. So
2020 Nov 16
1
Joining Samba to Upgraded 2003 domain failing
Hi Rowland
I am trying to follow the article but am having the error. That's why I am
trying to clean up this bad subdomain.
I don't know if these lists allow image attachments.
So I uploaded a screenshot here.
https://ibb.co/Ct3BLjL
I built a new domain for this problem in our lab. The domain listed with #1
is the one created by the domain provision.
However the one listed with the #2
2020 Oct 02
3
Lahman Baseball Data Using R DBI Package
I?m trying to pull data from one table (batting) in the Lahman Baseball database. Notice X2B for doubles and X3B for triples ? fourth and fifth from the right.
The dbGetQuery function runs fine when I leave there two out but I get error messages (in red) when I include 2B/3B or X2B/X3B.
Can anyone give me some direction?
Thanks,
Philip Heinrich
2024 May 15
1
FR: Customize background colour of row and column headers for the View output
About the decisions:
Actually, the same way dataedittext modifies the text colour not only
of data, but also of row and column names, and dataedituser modifies
the colour of all the borders, I think dataeditbg should modify the
background of all the window, at least that "inside" those
borders. Otherwise, any other option for the background colour on row
and column headers would allow
2007 Apr 03
1
rpm package for sles10
Hi,
I thought about changing the RPM package the guys of Redhat created,
because I wanted an Init Script for SLES10 built-in. I started documenting
the steps I took. Maybe it''s useful for someone else, although in German..
but the basic steps should be useable.
My little Installating puppet Howto:
http://wiki.njh.eu/Konfigurationsmanagement#Installation_3
The Init Script for SLES10:
2007 Jun 01
1
Determinant function (PR#9715)
Full_Name: Krzysztof Podgorski
Version: R version 2.4.1 (2006-12-18)
OS: Windows XP
Submission from: (NULL) (130.235.3.79)
The function ''det'' works improperly for a singular matrix and returns a
non-zero value even if ''solve'' reports singularity. The matrix is very simple
as shown below.
A <- diag(rep(c(64,8), c(8,8)))
A[9:16,1] <- 8
A[1,9:16] <- 8